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| author | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2007-10-24 10:12:09 -0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@ghostprotocols.net> | 2007-10-24 10:12:09 -0200 |
| commit | fde20105f332614b23a3131d706cd90bdd7db72d (patch) | |
| tree | 217c186a8c038a7a6d7bcc775081f9566b903e36 /net | |
| parent | 03cf786c4e83dba404ad23ca58f49147ae52dffd (diff) | |
| download | linux-3.10-fde20105f332614b23a3131d706cd90bdd7db72d.tar.gz linux-3.10-fde20105f332614b23a3131d706cd90bdd7db72d.tar.bz2 linux-3.10-fde20105f332614b23a3131d706cd90bdd7db72d.zip | |
[DCCP]: Retrieve packet sequence number for error reporting
This fixes a problem when analysing erroneous packets in dccp_v{4,6}_err:
* dccp_hdr_seq currently takes an skb
* however, the transport headers in the skb are shifted, due to the
preceding IPv4/v6 header.
Fixed for v4 and v6 by changing dccp_hdr_seq to take a struct dccp_hdr as
argument. Verified that the correct sequence number is now reported in the
error handler.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/dccp/ipv4.c | 4 | ||||
| -rw-r--r-- | net/dccp/ipv6.c | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index 222549ab274..3f1578db93e 100644 --- a/net/dccp/ipv4.c +++ b/net/dccp/ipv4.c @@ -241,7 +241,7 @@ static void dccp_v4_err(struct sk_buff *skb, u32 info) goto out; dp = dccp_sk(sk); - seq = dccp_hdr_seq(skb); + seq = dccp_hdr_seq(dh); if (sk->sk_state != DCCP_LISTEN && !between48(seq, dp->dccps_swl, dp->dccps_swh)) { NET_INC_STATS_BH(LINUX_MIB_OUTOFWINDOWICMPS); @@ -795,7 +795,7 @@ static int dccp_v4_rcv(struct sk_buff *skb) dh = dccp_hdr(skb); - DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(skb); + DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(dh); DCCP_SKB_CB(skb)->dccpd_type = dh->dccph_type; dccp_pr_debug("%8.8s " diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c index bbadd6681b8..62428ff137d 100644 --- a/net/dccp/ipv6.c +++ b/net/dccp/ipv6.c @@ -173,7 +173,7 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, icmpv6_err_convert(type, code, &err); - seq = DCCP_SKB_CB(skb)->dccpd_seq; + seq = dccp_hdr_seq(dh); /* Might be for an request_sock */ switch (sk->sk_state) { struct request_sock *req, **prev; @@ -787,7 +787,7 @@ static int dccp_v6_rcv(struct sk_buff *skb) dh = dccp_hdr(skb); - DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(skb); + DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(dh); DCCP_SKB_CB(skb)->dccpd_type = dh->dccph_type; if (dccp_packet_without_ack(skb)) |